The Lehle Little Dual amp switcher pedal routes your signal via gold-plated relays to Outputs A or B. Outputs A and B can feed 2 different amps simultaneously, since the signal paths are electrically isolated by the Lehle LTHZ high end transformer - completely eliminating hum loops. Both inputs can be routed in stereo to Outputs A and B. In addition, the Little Dual guitar pedal also incorporates gold-plated phase-reverse and ground lift switches.

This switcher is perfect for hands-free selection of piezo/electric hybrid guitar signal. It has the added bonus of transformer isolation, which eliminates the buzz from tying your amp and PA together electrically. This also balances the piezo signal, so if you add a TRS-XLR adapter to the piezo channel out, you won't need a direct box. The sound is transparent, and the only minor gripe is if the LEDs are powered by an adapter, you can hear a slight click when you switch. I'm sure it would be great for amp switching as well.